CCW Flashcards
What are the CCW Pump auto starts with the pump switch in auto?
- Load Shed
- SI
- Low discharge # @ 80#
What are the CCW Pump auto starts with the pump switch in neutral?
- Load Shed
- SI
What are the CCW Pump trips?
- Load shed
- Overload
- Overcurrent
What are the CCW Safeguards loads?
- RHR Hx
- RHR pp Seal Hx
- CTS pp Seal Hx
- SI pp LO Cooler & Seal Hx
- CCP LO cooler
What are the CCW Misc loads?
- SFP Hx - #1 load
- Letdown Hx
- Excess Letdown Hx
- RCP LO and Thermal Barrier Hx
- RCP Seal Water Hx
- CEQ Fan Motor Air Coolers
- WGC
- Reactor Vessel Support Coolers
- Cnt Penetration Coolers
- Sample HXs
- NBAE
- MS Penetration Coolers
- Recip CP
- Hydrogen Monitor
- PACHMAS
What isolates on a Phase “A” for CCW?
- SFP Hx Isolates
- Excess LD Hx Isolates
- Reactor Support Cooler Isolates
- NBAE Isolates
What isolates on a Phase “B” for CCW?
- RCP Cooling Isolates
(Thermal Barrier and Lube Oil coolers) - Requires Manual Trip of RCPs within 2 min **
What are the SI actions for CCW?
- CCW Hx Outlet Opens (also open on LOOP) **
- RHR Hx Outlet Opens to 3000 gpm
- ESW to CCW Hx throttles to 5500 gpm
- Letdown Hx Isolates
What are the power supplies for the CCW pumps?
- T11/21A West CCW Pump
- T11/21D East CCW Pump
What power supply does the Spare CCW pump use?
- Utilizes controls and power supply of pump being replaced
How tall is the baffle plate in the CCW Surge Tank and what is it for?
- Baffle plate is for train separation and its 48 in high = 3,300 gallons **
Does the surge tank have any auto makeup?
- No, Demin water makeup water valves (CRV-410/411) have no auto actions and they fail closed **
When will the CCW Surge tank vent valve (CRV-412) auto close?
- Vent valve (CRV-412) closes on CCW high rad signal
How do the demin water makeup water valves (CRV-410/411) fail?
- They fail closed on loss of air or DC power **
When does the CCW header low pressure alarm come in?
- Low pressure alarm is at 85 psig **
How many Gallons per inch in the CCW Surge Tank?
-69 gal per inch
When does the CCW Auto Start on a Load shed w/o SI?
- 3 sec
When does the CCW Auto Start on a Load shed with SI/CTS?
- 15 sec
What is the purpose for the Cntmt Penetration Coolers?
- Prevent concrete from drying out and cracking (spalling)
What is the purpose of the RCP Thermal Barrier safety ?
- Lifts at 2485# and allows for ctrled shutdown
When will the CCW Hx outlet valves open?
- SI
- Load Shed
Are the CCW HX Valves credited to open on a LOOP?
- No
How many CCW Trains are required to be Operable in Modes 1-4?
- 2 CCW Trains required
- Restore w/in 72hrs
What happens to CCW Sys when Cntmt press reaches 1.0 psig?
- CEQ fan motor cooler CIVs open
What does the CCW Outlet Valve throttle flow to on an SI signal?
- Full open
Why is there one line from CCW to the RCPs, and two lines coming out for the return from the RCPs?
- So we can isolate the thermal barrier if it leaking from the RCS
What are the nominal minimum and maximum flow rates for the CCW pumps
- 3000 gpm minimum
- 9000 gpm maximum
Do the CCW surge tank makeup valves automatically open
No
What is the source of the emergency makeup to the CCW
ESW to the CCW pump suction via temp mod (will not maintain surge tank level)
What is the most important load on the CCW miscellaneous header
SFP Hx
